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June 2017 QP (v1) Paper 1 AQA Biology AS-level.

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0 1 Figure 1 shows part of a DNA molecule 0 1 . 1 How many nucleotides are shown in Figure 1? [1 mark] 0 1 . 2 Name the type of bond labelled X in Figure 1 0 1 . 3 The enzymes DNA helicase and DNA polymerase are involved in DNA replication. Describe the function of each of these enzymes. [2 marks] DNA helicase DNA polymerase 0 1 . 4 Adenosine triphosphate (ATP) is a nucleotide derivative. Contrast the structures of ATP and a nucleotide found in DNA to give two differences.

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BIOLOGY Paper 1
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